Author

D. Kalathil

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#machine learning Preprint Oct 2026

TreeHCA: Hindsight-Guided Exploration and Credit Assignment for Multi-Turn LLM Agents

Outcome-supervised group-relative policy optimization (GRPO) assigns the same advantage to every token in an LLM agent trajectory, leaving useful and unhelpful decisions undifferentiated. Hindsight credit assignment (HCA) can refine this feedback, but its estimates rely on trajectories containing informative alternativ...

Debajoy Mukherjee, Jeremy Carleton, Sushil Vemuri et al. · 0 citations

#artificial intelligence Preprint Oct 2026

AgentDiscover: Autonomous Discovery with Minimal Search Scaffolding

Frameworks that use large language models for scientific discovery typically rely on a fixed, human-designed algorithm that decides what the model sees at each step, leaving the model only the role of proposer. The model knows nothing of the search beyond what it is shown. As models grow more capable, a question arises...

Mahdi Farahbakhsh, I. Sela, Fatemeh Doudi et al. · 0 citations